Revision's Bullet Ant Goggles With Occumax Plus Anti-Fog coating

7/27/2019 Revision's Bullet Ant Goggles With Occumax Plus Anti-Fog coating

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FOG HORN 2013Twobirds Flying Publication

Copyright 2013, Towbirds Flying Publication. All Rights Reserved.

Revisions Bullet Ant Goggles

With OCCUMAX Plus

Technology

By: Sal Palma

Revision Military has been designing anddelivering standard setting ballistic eye

protection for over 12 years. In addition to

being a key supplier to the DoD, the company

has been successful in acquiring contracts from

many ofworlds most forward-thinking military

organization. In 15 August 2013, the company

announced a 5-year contract to supply the

Swiss Armed Forces. On 29 August 2013, the

company entered into an agreement with the

Danish Defence Acquisition and LogisticsOrganization (DALO) to supply the Danish

military with an additional 3,000 Batlskin

Cobra Helmets for delivery in Q4, 2013.

Johnathan Blanshay, Revisions Founder and

CEO, has a great deal to be proud of. In a short

12 years hes managed to assemble a team that

transformed Revision into a global company

supplying a superb product, with outstanding

customer service and unwavering support for

military men and women around the world.

The vision to be the leading global supplier of

protective eyewear for our military drives

Revisions R&D, which resulted in leading edge

innovation; one being the OCCUMAX Plus lens

coatings for scratch resistance and fogging.

Eye protection is only useful when worn, and

Revision understands the factors that promote

the use of protective eyewear. Certainly

comfort is at the top of that list, as is optical

clarity. However, fogging is all too often an

occurrence prompting service men and women

to remove their eye protection. So, I am thrilled

to have the opportunity to evaluate the

companys latest advancement, OCCUMAX

Plus anti-fogging lens coating.

To understand OCCUMAX we need to

understand fogging; a natural byproduct

resulting from atmospheric conditions

described and dimensioned by dew point.

Dew point is that temperature at which water

vapor condenses at the same rate as itevaporates. It varies with ambient temperature

and relative humidity at atmospheric pressure.

Dew point is expressed in degrees Celsius or

Fahrenheit. In all cases except were relative

humidity is 100% the dew point is below

ambient temperature.


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Revisions Bullet Ant Goggles With OCCUMAX Plus Technology 2013

Copyright 2013, Twobirds Flying Publication, All Rights Reserved

The mechanics of fogging are often

misunderstood, so I am going to dive into that

for no other reason than to set some level of

understanding1.

Fogging, as it pertains to eyewear, occurs when

a surface comes in contact with the atmosphere

cooling the air layer its in contact with to a

point equal to, or below, the dew point. So, on

a cold day ambient temperature lowers the

surface temperature of your goggles lenses,

they in turn are in contact with the warm and

humid air volume between your face and the

lens internal surface; lowering air temperature

at the point of contact to, or below, the dew

point. We attempt to deal with is problem by

providing adequate ventilation to equalize

internal and external conditions, and chemically

treat the lens surface to inhibit or delay fogging.

In applying an anti-fogging solution or a coating

we dont defy the laws of physics; instead, we

attempt to delay, by at least 100 seconds, the

time it takes for droplets of moisture to form on

a treated surface; doing so, buys us time foracclimation or equalization to occur between

the lens surface and the ambient air. Once that

happens, the surface is no longer susceptible to

fogging and condensation. This is how it all

works.

The question to be answered in this review is

how effective Revisions OCCUMAX Plus

technology is at delaying the formation of

condensation on the treated lens surface. To dothat, we are using Revisions Bullet Ant goggles,

which along with the StingerHawk Spectacles,

1The Image PerformanceInstitute has a web site

that lets you easily calculate dew point. You can also

see the interaction between ambient temperature

and relative humidity to arrive at dew point. Its

excellent and easy to use.

Desert Locust and Wolfspider goggles will all be

rolled out with the OCCUMAX Plus lens

coatings.

Although I am not reviewing the goggles

themselves, I must say that I love the Bullet Ant

from Revision;

they are a low profile design with superb

ventilation, fit and feel. The fact that they are

low profile makes them an ideal candidate for

fogging, especially when worn during physical

exertion and prolonged periods of use.

During the manufacturing process, Revision

applies an Occumax anti-scratch coating on the

exterior surface of their lenses and the

Occumax anti-fog coating on the inside surface.

The Occumax anti-scratch coating is a hard

coating while the anti-fog coating is a rougher

sticky surface. So, in testing, I expected to see

fogging and condensation on the outer lens

surface but no fogging on the internal surface of

the lens2.

In designing my test and evaluation I wanted to

cover two conditions.

2To prevent exterior lens surface fogging, Revision

recommends use of its Anti-Fog Cloth, which is a dry

towelette good for about 25 applications. They can

be purchasedhere
http://www.dpcalc.org/http://www.dpcalc.org/http://www.dpcalc.org/http://www.revisionmilitary.com/store/accessories/reusable-anti-fog-cloth/anti-fog-cloth.htmlhttp://www.revisionmilitary.com/store/accessories/reusable-anti-fog-cloth/anti-fog-cloth.htmlhttp://www.revisionmilitary.com/store/accessories/reusable-anti-fog-cloth/anti-fog-cloth.htmlhttp://www.revisionmilitary.com/store/accessories/reusable-anti-fog-cloth/anti-fog-cloth.htmlhttp://www.dpcalc.org/


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First, and by far the more prevalent, fogging

that accumulates on the inside of the goggle

resulting from ambient temperatures being

lower than the interior of the goggle. If

Occumax Plus works, there should be no

fogging or condensation on the internal lens

surface.

The Second condition covers fogging that occurs

when the goggle is at a lower temperature than

the dew point, a condition that exists when

youve been sitting in an air-conditioned

vehicle, then without acclimation step outside

into a warm and humid environment.

To assess how effective the Occumax coating is

in addressing condition one, I engaged in

strenuous activity more specifically PT.

Throughout a four and one-half hour period, I

wore the Bullet Ants and experienced no

fogging or condensation. Note that these

goggles have ventilation openings at the top

and along the bottom of the frames; and my

breath, as I exhaled, had no clouding effect on

the interior lens surfaces.

Testing for the second condition required a trip

to the refrigerator. Station weather conditions

as reported at MacDill Air Force Base the day of

the test were: 87.1F, 30.05 inches of Hg, 53%

RH, 68F dew point. I chilled the goggles down

to 42F for 20 minutes before exposing them to

ambient temperature. The objective was to

determine how effective the OCCUMAX coating

is when transitioning from a cold environmentto a warm humid surrounding. This is a situation

you could encounter moving from an air

conditioned vehicle or aircraft into a hot and

humid environment.

You can readily see in the picture above that

fogging and condensation formed on the outer

surface of the lenses, which weve already

established as not coated for fogging. This begs

the question, why would you not coat the

exterior surface? I posed the same question toRevision, and received an enlightening

response:

When it comes to lens fogging and

scratching theres a trade-off; you can

either have really good anti-scratch or

really good anti-fog. If you develop one

coating that does both, it doesnt

particularly excel at either, leaving the

inside of your lenses somewhat foggy

and the outside more susceptible to

scratches. With goggles in particular,

industry has developed a manufacturing

technique called flow coating that

places the right coating where you need

it most. i.e.: anti-fog on the inside of the

lens where warm air from the wearers

face condenses, and anti-scratch on the

outside of the lens which is exposed to

the elements and requires protection

from blowing dust, sand and general

wear and tear


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In contrast, as the picture above clearly

illustrates, the interior surface of the lenses had

no perceivable fogging or condensation; any

cloudiness in the photo is on the lens outer

surface.

This was quite amazing, and a testament to how

effective the Occumax Plus anti-fog coating

technology is. These goggles were a full 26F

below dew point, and I am pleased to inform

you that Im a believer! If that sounds familiar

its because The Monkees did a song like

that

All of this boils down to some very good news

for Revisions customers; a ballistic eyewear

system of exceptional comfort; highly effective

against debris from a surface blast or stray

projectile, that wont fog up on you. When you

sum it all up, its not difficult to see why

Revision is the standard setting market leader.

Be sure to check out Revisions military line with

their Occumax Plus anti-fogging technology, I

think youll benefit from the experience.

-SP

Manufacturers Specifications:

EXCEEDS U.S. MILITARY BALLISTICIMPACT REQUIREMENTS FOR GOGGLES

(MIL-DTL-43511D, CLAUSE 3.5.10)

EXCEEDS ANSI Z87.1-2010 BALLISTICIMPACT AND OPTICAL REQUIREMENTS

CE CERTIFIED IN ACCORDANCE WITH EN166, EN 170 AND EN 172

CAGE CODE: 30VZ5

Revision Military

7 Corporate Drive

Essex Junction VT

05452 USA

T: 802.879.7002

T: 800.383.6049

F: 802.879.7224
http://www.revisionmilitary.com/http://www.revisionmilitary.com/http://www.revisionmilitary.com/

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Revision's Bullet Ant Goggles With Occumax Plus Anti-Fog coating